package Thread2;

import java.util.concurrent.locks.ReentrantLock;

public class Demo39 {
    private static int count = 0;
    public static void main(String[] args) throws InterruptedException {
        ReentrantLock locker = new ReentrantLock(true);
        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 5000; i++) {
                locker.lock();
                try{
                   count++;
                }finally {
                    locker.unlock();
                }

            }
        });
        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 5000; i++) {
                locker.lock();
                count++;
                locker.unlock();
            }
        });

        t1.start();
        t2.start();
        t1.join();
        t2.join();

        System.out.println("count = " + count);
    }
}
